Chuck for reamers, &amp;c.



0. FREDRIGKSON.

CHUCK FOR REAMERS, 6w.

APPLICATION FILED FEB. 20, 1902.

1,066,199, Patented July 1, 1913.

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CHUCK FOR REAMERS, 8:0.

Specification of Letters Patent.

Patented Jul i', i913.

. Be it known that I, OscAn FREnRIcKsoN, a citizen of the United States, residing at Buchanan, in the county of Berrien and State of Michigan, have invented certain new and useful Improvements in Chucks for Reamers, &c., of which the followin is a specification, reference being had to t e acholders, i and companying drawings. My invention relates to; tool has for its object toprovide a new and improved chuck' for holdin tapered boring tools, such as reamers, rills, etc., which will be cheaper in construction and more eflicient in operation than those heretofore employed for the purpose. I accomplish this object asillustrated in the drawings and as hereinafter described.

What I regard as new is set forth in the claims.

In the drawings, Figure 1- is a side elevation of my improved chuck having reamer fitted therein; Fig. 2 is a longitudinal vertical section of the chuck showing also the reamer; Fig. 3 is a longitudinal sectional View ofthe chuck, the reamer being removed; and Fig. 4 is across-section on line As illustrated in the drawings, my improved chuck consists of a tapered body 4 havin a tang 5 at its smaller end and a shoul er 6 at its larger end. The body of the chuck is designed to be applied to the ordinary sleeve socket commonly used in drill presses and. other machine tools, which is usually rovided with a recess at its inner end to receive the tang of the tool shank.

7 indicates a socket formed in the chuck body 4 extending from the'larger end inward, said socket being tapered co-conform to the taper of the tool shank.

8 indicates aseries-prferably three-of transverse slots in the body 4, which. intersect the recess7 at its inner end, as shown in Figs. 3 and 4.

9 indicates internally-projecting lugs or ribs formed in the recess 7 at its inner end. As shown in Figs. 2 and 3, the slots 8 extend somewhat nearer the larger end of the chuck than the lugs 9. This is due to the fact that said lugs are formed when the the lugs 9 is to'fit in the 1,Ofi6,199.

'- Application filed February 20, 1908. Serial No. 416,913.

To all whom it may concern:

. body of the chuck is bored out to form the recess 7, the main bore being carried to the point X inFigs; 2 and 3,-a bore of reduced diameter being thence extended to the bottom of the socket. The transverse slots 8 are then cut, leaving the lugs 9 as they are shown inthe drawings. The purpose of coves or channels in the reamer 10, which, in the form shown, is provided with three of such grooves or channels, as bestshown in 4:. The diameter of the shank of the reamer is such that it does not extend into the chuck much beyond the lower or outer ends of the lugs 9, at least not beyond the inner ends of the transverse slots 8 which are provided so that a-tool maybe inserted through said slots to force the reamer outward and detach it from the chuck. The lugs .9 serve to hold the reamer or the tool against rotation in the socket of the chuck, and the reamer is fur ther held in said socket by the close fitting" of its shank in the tapered recess 7. By the use of my improved chuck, reamers or drills, or other similar-tools, unprovided with enlarged shanksmay be readily fitted to the sleeve sockets of machine tools since the tool may be held firmly by my improved chuck while the chuck itself is applied to the sleeve socket of the machine tool. My improved chuck may, of course, be used independently of a machine tool, if desired. i

That which I claim as my invention, and desire to'secure by Lette'rsPatent, is,-

. 1. A chuck for reamers, etc.,' comprising duced diameter at the inner end of said shank of the tool, and a cylindrical bore of reduced diameter at the inner end of said socket, said bore being intersected by three socket, said bore being intersected by transequidistant transverse slots, forming seg-' verse slots, forming integral lugs; mental lugs. i Y 4. A chuck for reamers, etc., comprisinga OSCAR FREDRICKSON. 5 body having a tapered socket to receive the Witnesses:

shank of the tool, and a cylindrical bore of M. A. HANLIN, reduced diameter at the inner end of said GLENN E. SMITH. 

